both responses above are spot on – Sketchup for 3d work and draftsight for 3 view drawings. Draft sight looks, feels, tastes identical to autocad. The only issue with draft sight is the program likes to “call home” from time to time so internet access is needed sometimes. but heck, the NSA listens to everything we do now so whats wrong with a free tool sending marketing information back to it’s creator…

My first choice would be sketchup followed by Delta CAD. Sketchup does have a learning curve and Finewoodworking has a sketchup course for sale on disc or download that is designed for woodworkers. If you decide on sketchup which is free, I would definitely purchase the tutorial from Dave Richards at finewoodworking.com Sketchup is a 3D CAD program and Delta CAD is a 2D only program but is very easy to use. By the way, welcome to the web site and the best of luck from sunny and very hot Chandler Arizona.